l'heure de l'observatoire - Les Amants (Observatory Time - The Lovers) (1936) by Man Ray, featuring the celestial lips of his lover, Lee Miller.
The marquise diamond takes is name from the Sun King who desired a stone to be polished into the shape of the mouth of his lover, Madame de Pompadour.
Bittersweets twig ring with marquise diamond $650,
Katrina LaPenne Old World marquise ring $900